too few calories?

hi,

So I just came from my Dr for my 6 week post sleeve op check up.  I am doing really great...the veritable poster child for Cedars Sinai Center for Weight Loss Surgery.  I have lost 42 pounds since surgery and have not had 1 single instance of nausea, heartburn, or trouble getting my fluid and protein intake. 

So after the surgeon, I met with the dietician.  She says that I am eating far to few calories a day and wants me to bring that up.  To give you what I have been doing...I have been eating between 650 and 750 calories a day and have been hitting my protein goal of 90g per day.  So I've basically mainly been consuming protein with very little fat and very few carbs.  The weight has been falling off and I love it.

I am a male, 5'11 and she says that after 6 weeks (now) I should be on between 1100 and 1300 calories per day.  Wow, that seems like a lot.  I have been so  happy with the way I have been losing and am afraid that if I up my calories I will stop losing weight.  She assures me that won't happen, and warns that if I keep my calories so low for too long, my body will adjust my metabolism and make it even harder to lose weight. 

What experiences have  you had?  I want to listen to her, but I'm really afraid of that many calories.  Plus, while I am still in my honeymoon stage and really have nothing going on in the  appetite stimulating hormone department, I want to take advantage and hit my goal while things are most favorable.  According to today's body scan thingie, I have 51 more pounds to go to be at the "ideal" weight. 

Please share your thoughts, experiences and advice.

thanks.

1300 seems like a TON for 6 weeks out!  I couldn't even imagine how much you'd have to eat to achieve that.  I'm around 1200 at almost a year out.  I ate around 700-800 for the first 6-7 months and then ate around 1100 until I hit goal about 2 weeks ago.  I lost 184lbs in 11 months and I'm a 6'1 female..I'd listen to your center but that seems a little harsh